Isobutyl Vinyl Ketone

Isobutyl Vinyl Ketone is a branched α,β-unsaturated ketone featuring a conjugated carbonyl group adjacent to a terminal vinyl moiety and an isobutyl side chain. Its structure comprises a (3-methylbut-2-en-1-yl) group linked to a ketone functionality, conferring reactivity in Michael addition and electrophilic substitution pathways. As an API impurity, it arises from partial hydrogenation or side-chain isomerization during parent drug synthesis. This compound serves as a critical HPLC reference standard for quantifying process-related impurities in pharmaceutical formulations.